Bug 880437 - Do not try to release an already released Camera on shutdown. r=blassey

media/webrtc/trunk/webrtc/modules/video_capture/android/java/org/webrtc/videoengine/VideoCaptureAndroid.java

@@ -113,8 +113,10 @@ public class VideoCaptureAndroid implements PreviewCallback, Callback {
         GeckoAppShell.getGeckoInterface().removeAppStateListener(captureAndroid.mAppStateListener);
 
         captureAndroid.StopCapture();
-        captureAndroid.camera.release();
-        captureAndroid.camera = null;
+        if (captureAndroid.camera != null) {
+            captureAndroid.camera.release();
+            captureAndroid.camera = null;
+        }
         captureAndroid.context = 0;
 
         View cameraView = GeckoAppShell.getGeckoInterface().getCameraView();
@@ -177,8 +179,10 @@ public class VideoCaptureAndroid implements PreviewCallback, Callback {
             @Override
             public void onPause() {
                 StopCapture();
-                camera.release();
-                camera = null;
+                if (camera != null) {
+                    camera.release();
+                    camera = null;
+                }
             }
             @Override
             public void onResume() {